US3764490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering metals
Assignee: Individual
•
Filing: 1972-04-20
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Granted: 1973-10-09
•
Expires: 1992-04-20
Abstract
Abstract ORES OF COPPER AND OTHER METALS ARE EXTRACTED WITH AN AQUEOUS SOLUTION OF A LOWER VALENT METAL CHLORIDE SUCH AS CUPRIC CHLORIDE, HCL AND AN ALKALI METAL CHLORIDE SUCH AS SODIUM OR POTASSIUM CHLORIDE AT AN ELEVATED TEMPERATURE FOR EXAMPLE 100*C. THESE REAGENTS ARE ADVANTAGEOUSLY PRESENT AS A COMPLEX SUCH AS HNACUCL4. THE RESULTING CUPROUS CHLORIDE SOLUTION IS RECOVERED AND IS ELECTROLYZED TO PRODUCE COPPER METAL AND CUPRIC CHLORIDE. THE CUPRIC CHLORIDE IS CAUSED TO SETTLE TO THE BOTTOM OF THE CELL AND IS WITHDRAWN FOR RECYCLE.
Inventors
- 👤 W Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:11
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |